Abstract: A method of manufacturing a sole according to the present invention includes the steps of obtaining a rubber part by previously crosslinking a polymer mixture containing 50 to 100 mass % of a diene-based polymer and 0 to 40 mass % of an acrylonitrile component in a polymer component of the polymer mixture, halogenating the rubber part, and bonding the rubber part and thermoplastic resin to each other by molding said thermoplastic resin on said rubber part.

Abstract: In textile products (e.g. yarns, woven fabrics, knit fabrics) comprising highly crosslinked polyacrylic fibers (made of acrylic fibers by partially hydrolyzing a nitrile group to generate an amido group and a carboxylic acid group), fibers blended with the highly crosslinked polyacrylic fibers can be dyed in an even hue. A pre-dyeing treatment process for such textile products (e.g. yarns, woven fabrics, knit fabrics) comprising highly crosslinked polyacrylic fibers comprises a pretreatment step of immersing the textile product into an acidic solution and treating it at a high temperature and an elevated pressure. A dyeing process comprises the steps of conducting this pre-dyeing treatment process, and thereafter conventionally dyeing fibers blended with the highly crosslinked polyacrylic fibers. A pretreated and undyed textile product and a dyed textile product are obtained by the pre-dyeing treatment process and the dyeing process mentioned above, respectively.